Improvement in cotton-gins



A. P. KEITH.

Cottdn Gin.

N0. 2,132. v Patented Jan. 2, 1855.

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NITED STATES PATENT rrrcn.

IMPROVEMENT IN COTTON-ems.-

. Specification forming part of Letters Patent No. 12,132, dated January 2, 1855.

To aZZ whom it may concern:

Be it known that I, ASA P. KEITH, of Bridgewater, in the county of Plymouth and State ofMassachusetts, have invented a new and useful Improvement in Cotton-Grins; and I do hereby declare that the following description, with the accompanying drawings; forms a full, clear, and exact specification thereof.

The object of my invention is to improve the action of the brush of the cotton-gin on the air in creating the proper current for discharging the cotton from the brush-chamber into the lint-room.

To enable others skilled in the art to make and use my invention, I will describe its construction and operation as follows, reference being bad to the accompanying drawings, in which like parts are marked by like letters.

Figure 1 is an end view of the brush-head 1 a, (seen through the surrounding ceiling or end of the brush-chamberb.) Fig. 2 is a crosssection'of the brush, taken in the line C D. Fig. 3 is a longitudinal section'ofthe brush and ends of the chamber, taken in the line A B.

I make the brush'in a cylindrical form, with heads open at the center, and with openings between the lags or slats in which the bristles are set, from end to end of the brush, substantially 'in the manner specified in the patent granted to my brother, Edwin Keith, September 19, 1845, and now well known; and, in ad-' dition to said openings through the center of the brush-heads, I make a new circular opening, c,'farther out toward the circumference of each head by means of a slanting cut through the head, having its circumference on the inside of the head larger than on the outside, this opening, like the opening -at the center, being intersected by the arms d or portions of the head running from the shaft outward for the support of the outer rim of the brushhead. I make the slant of this new opening through the heads at such an angle (about forty-five degrees) with the plane of the head as to turn the current of air which is drawn in by the rotation of .the brush outward between the lags near their ends next to the ceilings of the chamber; and in order to turn said current still more and regulate its exit through the lags forming the surface of the brush, I place a guide-flange, c, on the inside of the brush-heads, at a suitable distance from and opposite to the inner or flaring end of said new opening through the head. The space between the inner side of the brush-head and the flange may be about five-eighths of an inch,

and the outer circumference of the flange may come within the same distance of the inner side of the lags, being suitably adjusted to the si'zeof the new opening and the dimensionsi of the brush. The flange may be made apart of or be fastened permanently to the inside of the bruslrliead. By this device the current of air which will be drawn-into the brush by its rotation through this outer circular open-' ing will be turned outward and delivered between the lags at the ends of the brush and next to the ceilings of the gin, so as to discharge the cotton cleanly from the ends of the brush into the lint-room, and not permit it to choke the brush nor be thrown down onto the .floor in front of the'mote-board. I also cut a hole through the ceilings of the gin or ends of the brush-chamber large enough to admit the whole brush-head to run freely therein, and I place the inside of the brush-heads exactly even or flush with the inside of the ceilings, so that the rows of bristles on the brush-lags will extend from ceiling to ceiling of the brush chamber or gin, and leave no space for eddies in the air. If the brush be long, it will require a center-head in the usual way for strength and support of the lags. The lags or slats in which the bristles are set may be fastened to the brush-heads by screws, sockets, flanges, or in any of the ways already in use. I do not deem itnecessary to describe the parts of the cotton-gin not immediately connected with my improvement.

I claimv The slanting circular'openings through the brush-heads with the guide-flanges on the inside, substantially as described.

ASA P. KEITH.

Witnesses:

. J OEL GrLns,

Josnrn GAVETT. 

